Air seal



s. VERMILYE' 1,773,828

AIR SEAL Aug. 26, 1930.

Filed Feb. 18, 1929 Patented AugQze, 1930 l 1373,82@

UNITED STATES PATE-NT oFFlcE SHERWOOD VERMILYE, OF LOUISVILLE, KENTUCKY, ASSIGNOR TO LOUISVILLE DRY- ING MACHINERYCO., INC., OF JEFFERSON COUNTY, KENTUCKY AIR SEAL Application led February 18, 1929. Serial No. 340,849.

My invention relates to air seals for dryers ric of the sleeve 10, thus drawing the face 11 of the direct heating type and has reference of the ring 9 against the face l2 of the flange more particularly to means for preventing air of the annular member 8, the faces 11 and 12 in-leakage at points where clearance has to be forming the seal. rFhis drag is maintained provided between the stationaryV and the as long as the part 7 revolves, thereby maino movable parts of the dryer. taining' the ring 9 seated against the annular rlhis invention is characterized by the promember 8, and thereby preventing air from vision of a flexible fabric membrane imper- Apassing into thev dryer through the clearmeable to air, surrounding the clearance and ance 6. carrying thereon a movable member which is Suitable means for lubricating the contact 55 adapted to be drawn against the seat provided ing surfaces of the ring are provided but not therefor on the movable part, by the drag shown in the drawing. caused on the member which is attached to v In place of a U-channel ring, a ring of an Y the membrane bytwisting the fabric of the angle iron may be used, the 'side of the angle if membrane. iron forming the flange serving as a seat for 6o In the appended' drawing forming part the ring attached to the flexible fabric. of this application, Figure l is a cross section I claim-'- through a dryer portion provided with an air '1. An 'air seal for a clearance between a seal embodying my invention, this section bestationary and a rotatable part, comprising v' ing taken on line 1-1, Figure 2. an annularmember on the rotatable part, a 65 Figure 2 is a cross section on line 2 2, ring on the annular member free to move Figure l. n thereon laterally and circumferentially, said The stationary part 5 of a dryer has a clearringandannularmemberhaving sealing faces, ance 6 around the movable part 7, so that the and an air impermeable fabric sleeve about 2'5 latter could rotate withoutinterference from the clearance secured at one end to the ring 70 the stationarypart 5. The movable part 7 and at the other end to the stationary part, is provided with an annular member or ring said sleeve fabric being adapted to twist to 8; as shown, it is a U-channel which is either draw the ring to bring its sealing face against welded or otherwise firmly secured to the that of the annular member. Y movable part;7 to revolve therewith. With- 2. In an air seal for a clearance between a f in the channelled annular member 8, a sealing stationary and a revoluble part, an annular ring 9 is mounted, which is Yof a slightly member secured to the revoluble part and larger diameter and smaller width, so as to having a flange, a ring mounted on the annuprovide for expansion both diametrically and Vlar member, so thatthe same can freely relaterally of the ring and the movable and stavolve therein, and said ring being free to 80v tionary parts of the dryer. move laterally to and from the flange, and To the ring 9 is secured onev endof a sleeve an air impermeable fabric sleeve about the 10 made of a flexible fabric of suflicient heat y clearance secured at one end to the stationresistance and impermeable to air. The ary part and at the other end tothe ring, said other end of said'sleeve 10 is secured to the sleeve fabric being free to twist under the y1'35 stationary part 5 of the dryer about the drag caused by the frictional engagement of clearance 6. the two rings.

As the part 7 of the dryer rotates,'the annu- 3. An air seal for a clearance between a lar member 8 revolves therewith, causing a stationary and a movable part, comprising a drag on ring 9, which twists slightly the fab-A pairof annular members with faces to form a 9o seul, said members being movable relatively, axially and rotatabl an impermeable fabric sleeve about the clearance connected at one end to the Stationary part and at the other end, to one Of the annulm members, said sleeve being free to twist and draw the annu- ]:u member connected thereto laterally t0 bring its sealing faces toward the other zmnlllzu member when said movable member rotates.

SHERWOOD VERMILYE. 

